Charles Anderson cander

Vim Cheat Sheet

FYI - this is not a general-purpose cheat sheet for vim. I've been using vim/vim for over 35 years.
So, this is more of list of random things in core-vim or various plugin-ins that I've recently started using or am strugging to remember when I need them.

Docker Cheat Sheet

All of these assume you're running as root. If not, preface them with sudo as needed.

List of Dangling Images

docker images --filter 'dangling=true'

To remove them:

docker images -q --filter 'dangling=true' | xargs docker rmi

Documenting ElasticSearch Java Client

The current API documentation for the ElasticSearch Java Client is woefully inadequate.

First of all, there is no JavaDoc. Luckily I found some at https://www.javadoc.io/doc/org.elasticsearch/elasticsearch/2.3.0

The tuorials don't provide any of the import statements, which makes it next to impossible to use.

For example, the TransportClient documentation contains the following code snippet:

Git Cheat Sheet

This isn't intended as an exhaustive reference for git. Rather, it's a collection of operations that I perform so rarely that I always have to look up how to do them.

Fetch Just One Remote Branch

(because I have a weak-ass Internet connection at home)

git fetch --no-tags <remote> <remote-branch-name>:<local-branch-name>

Abandon a Merge

git reset --hard HEAD

	#!/bin/env ruby
	#
	# Given output from find(1) listing files and directories, reproduce that
	# hierarchy with random data in the files.
	#
	# Usage: ruby make-dir-hierarchy.rb [find-output-file]
	#

	require 'securerandom'

	#!/bin/bash
	#
	# Slowly remove files from a directory
	# Usage: slow-rm.sh [-dry-run] dir
	#
	# Removes files older than MIN_AGE_DAYS one at a time syncing and
	# sleeping after every BATCH_SIZE files.
	# A BATCH_SIZE of 300 will take at least 56 minutes to remove 1M files

	BATCH_SIZE=300

	import java.net.URL;
	import java.io.InputStream;

	public class httpstest {
	public static void fetchUrl(String urlStr, String msg)
	{
	try {
	System.out.println(msg);
	System.out.println("Opening " + urlStr);
	URL url=new URL(urlStr);

	# -- mode: ruby --
	# vi: set ft=ruby :

	# Vagrant file for Modern IE (https://www.modern.ie/en-us) boxes
	# This file is for Windown 7 running IE9, but there are other possibilities.
	# NB: Vagrant wants to ssh into the VM, but these VMs don't have ssh. So,
	# you'll get a timeout error message, which is safe to ignore.

	# To use a different box, replace the config.vm.box_url with the URL and
	# update the config.vm.box to some name you want to refer to it as.

	# This Sinatra endpoint is something I added to the Google Ruby quick-start
	# web app - https://developers.google.com/+/quickstart/ruby
	# It demonstrates how to write to the moments.insert API, for which I
	# couldn't find any Ruby examples.
	post '/write_activity' do
	# Check for stored credentials in the current user's session.
	if !session[:token]
	halt 401, 'User not connected.'
	end

	#!/bin/sh
	#
	#
	# From: [email protected] ([email protected])
	# Subject: bournebasic
	# Newsgroups: comp.sources.misc
	# Date: 1987-08-18 18:54:12 PST
	#
	# Here's a useful BASIC interpreter written in Bourne shell.
	# There's no manual but this demo shows the most salient features: